Boiler-furnace.



J. F. CUNNINGHAM.

BOILER FURNACE.

APPLICATION FILED JULY 29. 1915- 1,216,661. Patented Feb. 20,1917.

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.I.' F. CUNNINGHAM.

BOILER FURNACE.

APPLICATION FILED JULY 29. I915.

1,216,661. 1 Patented F0120, 1917.

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JOHN F. CUNNINGHAM, 0F SPRINGFIELD, MISSOURI.

BOILER-FURNACE.

Specification of Letters Patent.

Patented Feb. 20, 191?.

Application filed July 29, 1915. Serial No.42,e5s.

To all whom it may concern:

Be it known that I, JOHN F. CUNNING- HAM, a citizen of the United States, and resident of Springfield, Greene county, Missouri, have invented certain new and useful Improvements in Boiler-Furnaces, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forn'iing a part hereof.

Hy invention relates to improvements in boiler furnaces, wherein a plurality of integrally cast units or sections are superposed to form the complete furnace.

My invention consists in certain novel features of the construction and arrangement of parts which will be hereinafter more fully described, pointed out in my claim and illustrated by the accompanying drawings, in which:

Figure 1 is a plan, partly in section, of a boiler furnace embodying my improve ments;

Fig. 2 is a simple longitudinal sectional elevation of the furnace;

-Fig. 3 is a transverse sectional elevation taken on the line 33 of Fig. 2; and

Fig. 4 is a transverse sectional elevation taken on the line l4 of Fig. 2.

Referring by numerals to the accompanying drawings: 5 designates the base section, which consists of a rectangular casting com vprising vertical walls having outstanding base flanges 6 and at their tops an inwardly projecting flange 7. In one of the walls there is formed an opening 8 and on the exterior of the wall adjacent each side of said opening are the perforated ears 9 on which to hinge in a common manner the ash door 10.

11 designates the grate section, which is cast complete as an integral unit of rectangular form of such dimensions as to rest within the base section 5 upon the flanges 7 The casting generally comprises a rectangular water body 12 surrounding the entire section, a water body 13 in communication with the water body 12 and intermediate the end sections of the water body 12 and triangular shaped tubular grate bars between the water body 13 and the forward water body section 1.4.

Formed in the upper surface of the grate section 11 between the water bodies 13 and the rearmost body 12 is a seat 14, to receive a plate 15, which shuts off the space between these bodies over the top of the ash pit or interior of the base section 5. 16 designates the fire pot section of the same exterior dimensions as the grate section just described and like said grate section consists of a single unitary casting, comprising a rectangular Water body 16 and the forward portion of this section forms the fire pct '18.

The forward section of this water body is of less height than its remaining portion, to the end that there is formed through the section an opening 19 leading into the fire pot. Projecting forwardly from the front wall of this section and on either side of said opening 19 there are pairs of perforated cars 20, upon'which are hinged in a common manner the clinker doors 21, which provide access to the fire pot for tending the fire.

The numeral 23 designates units which are of the same general construction as the fire pot section 15 except for the opening 19, their water bodies 24 and 25 forming a magazine 26 for fuel above and registering with the fire pct 18, and the water bodies 27, together with the water bodies 25 and the tubes 28 forming a tubular water boiler.

The water tubes 28 are triangular in cross section and are preferably positioned as shown, with one of their points at the top, in order that they require as little cleaning as possible, in that they present side surfaces at angles prohibiting much lodgment of soot and the like.

The grate section'12 has projecting laterally therefrom near its top surface the perforated ears 29, and each of the other sections described has similar perforated cars 30, whereby said sections may be secured together in superposed arrangement.

The numeral 31 designates the cap sec tion or top of the furnace, which is, like the other sections, cast complete as anintegral unit and comprises a single shell fitting over the uppermost one of the sections 23.

In the top of this head section 31 there is vith the laterally projecting perforated ears 38 whereby it may be secured to the uppermost section 23. The lowermost section 11 is provided with means for connection with a water inlet pipe 39 and the uppermost section 23 is provided with a water outlet connection 40. For establishing communication between the various water bodies of the sections I provide the push-nipples 41, which by preference are fixed in place in certain of the sections, to the end that the sections placed thereover cally placed in communication with the said certain sections by the simple placement over said sections.

It is to be observed from Fig. 2 that the water body 13 of the grate section and the water bodies 25 are spaced apart whereby to provide a passageway 42 for the products of combustion from the magazine and fire V pot into the boiler tube section.

By reason of the sectional construction, 'he furnace may be set up in different heights, that is by using more or less of the units furnaces may be built according to the vertical spaces selected for their occupancy.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent of the United States therefore, is:

A boiler furnace comprising in combina- Gopies of will be automati this patent may be obtained for five cents each,

tion, an integral base unit, having means for access thereinto, a grate section having integral water holding bodies forming grate bars, a plate for partially closing communication between the base section and the productions of combustion pass, and a top a section having a wall dividing the space therein substantially the same as the combined magazine and tubular boiler section, integral means for attaching a furnace pipe thereto and means for gaining access thereinto, said seotionslhaving the water bodies having means for establishing relative water con'nnunication and at least two of the sections having means for connection with service and drain pipes.

In testimony whereof, I have signcd my name to this specification, in presence of two subscribing witnesses.

J OHN'F. CUNNINGHAM.

Witnesses Bnssrn A. Knox, L. M. MEHL.

by addressing the Commissioner of Patents,

"Washington, D. C. 

